• gyla regilla,
• byla regilla,
• nyla regilla,
• jyla regilla,
• uyla regilla,
• yyla regilla,
• htla regilla,
• hgla regilla,
• hhla regilla,
• hula regilla,
• h7la regilla,
• h6la regilla,
• hyka regilla,
• hypa regilla,
• hyoa regilla,
• hylz regilla,
• hyls regilla,
• hylw regilla,
• hylq regilla,
• hyla eegilla

The adjective form of the word "Hyla Regilla" is "Regillan".

The plural form of "Hyla Regilla" is "Hyla Regilla". This is because "Hyla Regilla" is the scientific name for a specific species, the Pacific tree frog, and scientific names are generally used in both singular and plural forms.

The singular form of "Hyla Regilla" is "Hyla Regilla". This term refers to a specific species of tree frog native to western North America, often referred to as the Pacific tree frog or the West Coast tree frog.